Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam dam cao snippets" » "nam dan cao snippets", "nam da cao snippets", "nam dao cao snippets", "nam dam bao snippets", "nam nam cao snippets", "nam dam rao snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("nam dam cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam dam cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam dam cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam dam cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.